-68.01% is the change from 497 to 159
Calculation steps:
[( 159 - 497 ) ÷ 497] x 100 = -68.01%
Formula
Percentage change = [(159 - 497) / 497] x 100
Subtract the new number by the original number
159 - 497 = -338
-338 ÷ 497 = -0.6800804828973843
-0.6800804828973843 x 100 = -68.01%